Quick quiz: Ontario rebates
A few questions from the programs we track. Tap an answer to see why.
The Real Choices, Straight Up
Vinyl Frame, Double-Pane Low-E
Cost installed: $500-$900 per window, or roughly $8,000-$14,000 for a full-home 15-window replacement. Best for: most homes in southern Ontario's climate zone.
The standard, most affordable option that meets ENERGY STAR's rating for southern Ontario in most cases. Vinyl doesn't need painting and resists rot, which matters through Ontario's humid summers.
Vinyl Frame, Triple-Pane
Cost installed: $700-$1,200 per window, or roughly $10,500-$18,000 for the same 15-window home. Best for: northern Ontario cities like Greater Sudbury, and colder-zone homes in the Ottawa area.
Ontario's ENERGY STAR climate zone requirements get stricter the further north you go, and triple-pane is often the only realistic way to clear the bar in northern zones. In Toronto or the GTA's milder climate, double-pane low-E usually still qualifies at a lower price.
Fiberglass Frame
Cost installed: $900-$1,500 per window, or roughly $13,500-$22,500 for a full-home replacement. Best for: larger window openings and homeowners planning to stay long-term.
Fiberglass expands and contracts less than vinyl through Ontario's wide seasonal temperature swings, which reduces seal failure over time on bigger picture windows. It costs more upfront for the same glazing performance as vinyl.
| Type | Cost per window | 15-window home | Best for |
|---|---|---|---|
| Vinyl, double-pane low-E | $500-$900 | $8,000-$14,000 | Southern Ontario climate zone |
| Vinyl, triple-pane | $700-$1,200 | $10,500-$18,000 | Northern zones, colder winters |
| Fiberglass | $900-$1,500 | $13,500-$22,500 | Large openings, long-term durability |
How the Ontario Rebate Applies
Windows and doors pay $100 per rough opening through HRSP, but you can't claim it as a standalone upgrade. Because window and door replacement is usually done alongside insulation or air sealing as part of a bigger envelope upgrade, the program requires at least 2 qualifying upgrades from that group (insulation, windows/doors, heat pump water heater, air sealing) to participate — completing 3 or more earns an extra $500 bonus on top.
Here's the process: book an initial home energy assessment with a registered energy advisor ($600, refunded once you complete the work), get a custom report confirming which openings qualify, complete the window/door replacement plus at least one other qualifying upgrade, then book a follow-up assessment to confirm the work. The rebate arrives by mail within 60 days.
Not every window qualifies — it needs to meet ENERGY STAR's rating for your specific climate zone. A standard double-pane replacement doesn't automatically clear that bar in every part of the province, so confirm the specific model before buying.
The $100-per-opening rate and bundling rule are provincial, so they're the same whether you're in Toronto, Ottawa, or London — check your Ontario city page for local installers.
What to Check Before You Buy
- Plan the bundle before you get quotes: since windows alone don't qualify, decide upfront whether you're pairing them with insulation or air sealing — that changes your total project cost and total rebate.
- Book the assessment first: HRSP's process starts with a paid ($600, refunded) assessment, not the installation quote — get this on the calendar early since it can add weeks to your timeline.
- Confirm ENERGY STAR climate zone rating: ask the installer to show the specific model's zone certification, not just a general "ENERGY STAR" label.
- Count your rough openings: the $100 rate is per opening, so a 12-window replacement pays differently than a 20-window one — get an exact opening count before budgeting your net cost.
What to Ask Before You Sign
- "Does this specific window model meet ENERGY STAR's rating for my climate zone?"
- "Are you pairing this with another qualifying upgrade so I hit the 2-upgrade minimum?"
- "How many rough openings does this quote cover?"
- "Will you help coordinate the HRSP assessment, or do I book that myself?"
- "What's the warranty on the seal, not just the glass?"
The One Number That Matters
A full window replacement in a typical Ontario home cuts heating and cooling costs by roughly $300-$600/year. On a 15-window, $10,000 project, the $100-per-opening rebate plus a possible $500 bundling bonus knocks $1,500-$2,000 off the total — meaningful, but the bigger payback still comes from pairing the work with insulation for the combined HRSP bonus.
